Vincent bietrix



v. BIETRIX.

FURNACE FOR-PREPARING ARTIFIGIAL FUEL.

(No Model.)

Patented June' 2, 1885.-

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VINCENT BIETRIX, OF ST. ETIENNE, FRANCE.

FURNACE FOR PREPARING ARTIFICIAL FUEL.

OPECIPXCATION forming part of Letters'Patent No. 319,180, dated June 2,1885.

Application filed February 1'2, 1885.

To all whom it may concern:

Be it known that I, VINCENT BIETRIX, a citizen of the Republic ofFrance, residing at St. Etienne, France, machinist, have invented a newand useful Improvement in Furnaces for Preparing Artificial Fuel to beUsed in the Manufacture of Coal Bricks, (patented in France, No.127,871, hearing date December 20, 1878,) of which the following is aspecification.

My invention relates to a furnace for more thoroughly mixing thecompound for forming agglomerations, and the aims of my invention are,first, to avoid an excess of water in the compound; second, as a meansof obtaining a well-manufactured article to heat the com pounduniformly; and', third, to require less motive power than any otherapparatus. I attain these results by the furnace illustrated in theaccompanying drawings, in which Figure l is a vertical section of theentire furnace; Fig. 2, a top view of the same as it ap pears after theremoval of the arch from the furnace, and Fig. 3 a partial section by AB of Fig. 2.

Similar letters refer to similar parts throughout the several views.

The furnace specially applied to the manufacture of coal agglomerationsis of circular form. It consists ofa turn-table,P, which moves with theagglomerating-niachine. This turntable is surrounded by brick-work.Supported by a sheet-iron casing upon the brick-work rests a dome shapedarch, through which a cast iron cylinder, 0, having an axis, a, providedwith scraper-blades, passes. By a lateral fire-box, F, with two opposingdoors in the interior of the furnace, the temperature necessary toeliminate the water contained in the coal, to heat the latter, and tofuse the residue of the coal-tar is obtained. The flames after havinglicked the upper surface of the compound spread out upon the sole orbody of the furnace and heated the arch, which afterwa-rd acts byradiation, pass underneath the body or sole of the furnace to theopposite side from the fire-box through two cast-iron fiues. (Shown inFig. 3.) They are then carried from thence through a fine to thechimney. Around the casing of the furnace are con structed six openings,0 o o o o o. The first (N0 model.) Patented in France December 20. 1878,No. 127,871.

four are for the purpose of introducing scrapers directed in the radialform, and furnished with prongs, which turn over the material, stir itup, and thus allow the residue of the coal-tar to melt, the coal to beuniformly heated, and both to present each of their parts to the contactof the flames and of the body or sole of the furnace. Opposite the fifthopening, 0, there are two bars-one fixed, E, the other movable, Ewhieh,by means of the hinged blades a a a, arranged in the form of Venetianblinds, so as to be slanted more or less at will, gradually carry thematerial from the center to the circumference, turning it over andstirring it up like the prongs. These partitions, in the form ofVenetian blinds, are also intended to regulate the thickness of thelayer, and consequently the time it should remain on the body of thefurnace. Another scraper, R, worked by a rod placed outside the furnace,removes the material from the center to be acted upon by other scrapers,previously mentioned, and regulates the dis charge. The sixth opening,0, is the exit for the paste or mixture when suitably prepared. Theseopenings act also as windows, by means of which account may be taken ofthe regular progress of the operation by opening the doors fitted tothem.

The entire furnace is constructed upon a bed of masonry, a hollow recessin which allows the shafting to pass and command the bottom or sole ofthe furnace.

For furnaces for producing large quantities, several furnace floors orsoles may be used, one above the other. The compound, arriving on theupper one, falls from one to the other until it arrives on the bottomone, from which it is taken up and carried to the agglomerating-machine.The placing of the floors one above the other may be effected by floorsor soles superposed and fixed on the same shaft or by floors or solessupported on differ ent shafts. On each of the floors or soles thecompound is stirred about and spread out by scrapers as in the simplefurnace. One or more ordinary or gas fire-boxes, as in the first case,give the mixture the desired temperature. The gases, being carried adistance equal to twice the diameter of the floor or sole of thefurnace, have time to burn completely and arrive at a low temperature atthe chimney. The fuel is therefore well utilized. The scrapers, inthoroughly stirring about and turning over the compound, equalize theheating and fusion, and assist in the preparation of the paste. The hightemperature obtained induces a softening of the soldering or stickyproperties of the coal, and consequently effects a great saving inresidue of tar. Finally, this same temperature effects what is of vitalimportance, especially when the coal has been washed-via, theelimination of the water. When the residue of tar contains an excess ofvolatile matters, it may be introduced in the coal at its exit from thefurnace, in which case the object of the apparatus is to eliminate thewater and heat the coal sufficiently to melt the residue immediately itis incorporated.

The said furnace may be used to heat coal only, or to heat coalpreviously mixed with the residue of coal-tar whether such furnace beheated by one or more fire-boxes, and whether these fire-boxes beordinary or gas fire-boxes, the gases being produced by gasmakingmachines near to or at a distance from and axis a, substantially as andfor the purposes set forth.

VINCENT BIETRIX.

Witnesses:

MARIE BAUM, LEON BATAULT.

30 scrapers E E and R, blades a aa, cylinder 0, a

